SQL Server 2012 Service Pack 2 (SP2) RTM is now available for download at the Microsoft Support site. Service Pack 2 contains all the hotfixes released since the initial release of SQL Server 2012 RTM.
Whether You are facing issue in your environment or not, It’s Recommended to install in your environment.
Download Link :
SQL Server 2012 SP2 : http://www.microsoft.com/en-us/download/details.aspx?id=43340
SQL Server 2012 SP2 EXPRESS : http://www.microsoft.com/en-us/download/details.aspx?id=43351
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Reference : Rohit Garg (https://mssqlfun.com/)